Suppose that the random variables X,,..., X and Y,...,Y, are random sample from independent normal distributions N(3,8) and N(3,15), respectively.Suppose that the random variables X,,..., X and Y,...,Y, are random sample from independent normal distributions N(3,8) and N(3,15), respectively.b) P(X>}7+l), X3 S a constant c such that P[